Its mana value is still based on its mana cost
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of Lyse Hext's second ability)
Projects that involve 3D animation, custom illustration, or complex storytelling can go higher
If, however, that five-drop in hand was actually a six-drop, then Id generally just turn my lowest-cost card into ink
Once a creature that has reach because of Sphere Grid's last ability has blocked a creature, removing all +1/+1 counters from that creature or causing Sphere Grid to leave the battlefield won't cause that creature to stop blocking
What can you say except, Youre welcome